🚚 Move effect sources to separate directory

docs/how-to-create-new-effects.md

@@ -78,7 +78,7 @@ Just remember to replace `simple-fade` with your custom name!
 
 ### 2. Creating the Effect Class
 
-You will have to create a new GLSL file called `resources/shaders/simple-fade.frag` and a new JavaScript source file called `src/SimpleFade.js`.
+You will have to create a new GLSL file called `resources/shaders/simple-fade.frag` and a new JavaScript source file called `src/effects/SimpleFade.js`.
 Simply paste the following source code to the respective file.
 Please study this code carefully, all of it is explained with inline comments.
 
@@ -239,7 +239,7 @@ Like this:
 ```javascript
 const ALL_EFFECTS = [
   ...
-  new Me.imports.src.SimpleFade.SimpleFade(),
+  new Me.imports.src.effects.SimpleFade.SimpleFade(),
   ...
 ];
 ```